Pls answer fast (3/7 ÷ 1/2) ÷7/8

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Simplify the expression. -2/5(10+15m-20n)

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